Despite the large amount of life span he just received, he still has much more that he desires. Even though his hard work paid off in a way that is higher than his expectations, he still isn't satisfied.
He wants to experience the feeling of being at the top of the hierarchy, and he wants to see the view of someone at the limit of cultivation.
Maybe even then, he will still want more. It is just human nature. He had this insatiable need when he was on earth, and he still has it now after he died and reincarnated.
He clenched his fist and swore to himself, "I want to be the greatest and the strongest. If I am a star, I want to be the brightest. This stage will not be my limit."
After encouraging himself, he returned his attention to the changes that he has undergone.
He wasn't surprised that he had received so much life span, but it was still a pleasant bonus to him. The extra life span gave him the assurance of being able to reach the nascent soul realm before dying.